18877081968 has 80 divisors (see below), whose sum is σ = 55932134400. Its totient is φ = 6089376960.

The previous prime is 18877081961. The next prime is 18877082033. The reversal of 18877081968 is 86918077881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18877081961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691398 + ... + 718181.

It is an arithmetic number, because the mean of its divisors is an integer number (699151680).

Almost surely, 2^18877081968 is an apocalyptic number.

18877081968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18877081968 is an abundant number, since it is smaller than the sum of its proper divisors (37055052432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18877081968 is a wasteful number, since it uses less digits than its factorization.

18877081968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409627 (or 1409615 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 63.

The spelling of 18877081968 in words is "eighteen billion, eight hundred seventy-seven million, eighty-one thousand, nine hundred sixty-eight".